diff --git a/server/s3/src/index.ts b/server/s3/src/index.ts
index 74abd57f67..7e514e3d8d 100644
--- a/server/s3/src/index.ts
+++ b/server/s3/src/index.ts
@@ -71,8 +71,9 @@ export class S3Service implements StorageAdapter {
   expireTime: number
   client: S3
   constructor (readonly opt: S3Config) {
+    const endpoint = Number.isInteger(opt.port) ? `${opt.endpoint}:${opt.port}` : opt.endpoint
     this.client = new S3({
-      endpoint: opt.endpoint,
+      endpoint,
       credentials: {
         accessKeyId: opt.accessKey,
         secretAccessKey: opt.secretKey